wololo.net/talk

Littel outdated but still a good overview

edit: updated MoBo image at wiki see next reply

This is also a great source for Motherboard information:
https://www.pspdevwiki.com/wiki/Motherboards

I am trying to build a psp1000 ta-086 MB into a new generic replacement shell but when umd is closed it doesn't connect with MB onboard umd button.
Also, does anyone know what version of psp1000 sound card is compatible with ta-086? Thank you!